ADJ (与大城市的名称连用,指包括附近城区及郊区在内的整个城市)大的 Greater is used with the name of a large city to refer to the city together with the surrounding urban and suburban area.
...Greater London. 大伦敦区
ADJ (与某国名称连用,指包括该国和曾属该国或者人们认为应属该国的地区在内的更广阔的区域)大的 Greater is used with the name of a country to refer to a larger area which includes that country and other land which used to belong to it, or which some people believe should belong to it.